The cause of the little Rhino has preliminarily determined to be a significant internal blood loss. Unbeknownst to zoo officials of Tundu's keepers, she may have received an injury from one of the other rhinos.

Zoos SA veterinarian Dr. Dave McLelland said they would wait for the results of laboratory tests to determine the cause of death.

“Tundu had some bruising over her ribs,” Dr. McLelland said.

“She also had a massive hemorrhage from her diaphragm into the chest cavity.

“One possible scenario is that Tundu may have been wedged between two older rhinos during rough play, which led to her sustaining these injuries.”

Tundu was one of five white rhinos bred at Monarto, and was the last to be born in September 2015.

White rhinos are known to be placid and friendly in nature compared to black rhinos.